WO2004067924A1 - Entrainement mecanique de soupape entierement variable destine a moteur a combustion interne a piston alternatif a equilibre de jeu de soupapes reglable - Google Patents

Entrainement mecanique de soupape entierement variable destine a moteur a combustion interne a piston alternatif a equilibre de jeu de soupapes reglable Download PDF

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Publication number
WO2004067924A1
WO2004067924A1 PCT/EP2004/000124 EP2004000124W WO2004067924A1 WO 2004067924 A1 WO2004067924 A1 WO 2004067924A1 EP 2004000124 W EP2004000124 W EP 2004000124W WO 2004067924 A1 WO2004067924 A1 WO 2004067924A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas exchange
valve
play compensation
eccentric sleeve
cylinder head
Prior art date
Application number
PCT/EP2004/000124
Other languages
German (de)
English (en)
Inventor
Thomas Koch
Markus Duesmann
Sven Lauer
Helge Djie
Original Assignee
Fev Motorentechnik Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fev Motorentechnik Gmbh filed Critical Fev Motorentechnik Gmbh
Priority to DE502004008865T priority Critical patent/DE502004008865D1/de
Priority to EP04701291A priority patent/EP1590554B1/fr
Publication of WO2004067924A1 publication Critical patent/WO2004067924A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • Mechanical valve drives have a camshaft, a stroke predetermined by the geometry of a cam being transmitted to the gas exchange valve to be actuated via a rocker arm.
  • the arrangement of adjustable stroke transmission means between the cam and rocker arm makes it possible to make a mechanical valve train fully variable.
  • Fully variable mechanical valve train for a piston combustion. Engine are known for example from DE 100 06 018A or WO 02 / 053881A.
  • a stroke transmission means formed from a plurality of interacting partial elements is arranged between a drive means, for example in the form of a cam of a camshaft, and the gas exchange valve to be actuated, which enables the full stroke predetermined by the cam contour to be set between a zero and a correspondingly arranged adjustable control element. Stroke and the full stroke according to the operational requirements.
  • the stroke transmission means acts on a rocker arm, which is supported with its free end on the shaft of the gas exchange valve to be actuated and with its other end is mounted on a, preferably hydraulically actuated, play compensation element arranged on the cylinder head, forming a pivot bearing.
  • the invention has for its object to improve such multiple sub-elements valve trains in that unavoidable, proper function disadvantageously influencing manufacturing tolerances can be compensated.
  • the object is achieved according to the invention with a variably adjustable valve train which has the features specified in claim 1. Characterized in that the play compensation element is connected to an adjusting means, there is the possibility of changing the geometric assignment of the rocker arm to the stroke transmission means by shifting the pivot bearing of the rocker arm and thus achieving perfect kinematics.
  • the means for the adjustment is formed by an eccentric sleeve connected to the cylinder head as a receptacle for the play compensation element.
  • the eccentric sleeve is rotatably arranged.
  • an eccentric sleeve with an eccentricity is provided, which corresponds to the expected maximum manufacturing-related dimensional deviation.
  • a stepless adjustment of the pivot axis of the pivot element can then be effected with respect to the fixed axis of rotation of the guide element.
  • means are provided for fixing the eccentric sleeve to the cylinder head. These can be formed, for example, by a corresponding tab on the eccentric sleeve, which engages in the cylinder head. It is also possible to provide the eccentric sleeve with an axially extending groove into which a steel ball is pressed after adjustment, so that the eccentric sleeve is fixed while deforming the base material of the cylinder head.
  • Fig. 3 is a plan view of the arrangement acc. Fig. 2,
  • FIG. 4 shows a perspective view of a play compensation element with an eccentric sleeve.
  • the valve train shown schematically in Fig. 1 consists essentially of a gas exchange valve 1, which is held in the closed position via a valve spring 2. Associated with the free end 3 of the valve stem of the gas exchange valve 1 is a stroke transmission means 4, which is made up of a plurality of interacting partial elements which can be partially adjusted in relation to one another and which acts on a rocker arm 5.
  • stroke transmission means in the sense of the invention, all are between the drive means 14 (camshaft of a camshaft or also electrical or hydraulic actuators) and one the rocker arm 5 acting directly on the gas exchange valve 1 and interacting with each other are sub-elements. By adjusting sub-elements relative to one another, their mechanical-geometric interaction can be changed, so that with a stroke that is fixed, for example, by a cam, the actual stroke that acts on the gas exchange valve 1 via the rocker arm 5 is variable between “zero” and “full stroke” can be adjusted.
  • a guide element 11 with a control cam 12 and a pivot element 8 are essentially provided as sub-elements of the stroke transmission means 4.
  • the rocker arm 5 is supported by a lash adjuster 6 to compensate for the valve lash on the cylinder head or engine block and rests with its free end 7 on the shaft end 3 of the gas exchange valve 1.
  • the rocker arm 5 is supported on the play compensation element 6 at the same time forms a pivot bearing 6.1 for the rocker arm 5.
  • the pivot element 8 is mounted on the rocker arm 5 between the pivot bearing 6.1 and the support on the shaft end 3 of the gas exchange valve 1 so that it can pivot back and forth about a pivot axis 9.
  • the pivot element 8 has on its
  • Pivot axis 9 facing away from the free end of a guide roller 10.
  • the guide element 11 with its cam 12 for the guide roller 10 is also assigned to the pivot element 8.
  • the guide element 11 is adjustable on the cylinder head or engine block about a fixed axis of rotation in the direction of the double arrow 13 with the aid of an actuator relative to the gas exchange valve 1, so that, as will be explained in more detail below, 10 different rolling areas can be specified for the rolling of the guide roller ,
  • the pivot element 8 is further provided between the guide roller 10 and the pivot axis 9 with a pressure roller 8.1, on which a drive means in the form of a cam 14 of a camshaft acts with its control contour 15.
  • the pivoting element 8 is pressed against the control contour 15 of the cam 14 via a return spring 16, for example in the form of the winding or spiral spring shown here.
  • the gas exchange valve is shown in the closed position.
  • the pivot element 8 is pivoted about its axis of rotation 9. Since the guide roller 10 rolls on the control contour 12, the guide roller 10 can only follow the control contour 12 if the guide element 11 is positioned accordingly, so that the rocker arm 5 supported on the swivel bearing 6.1 is also supported by the force between cam 14 and pressure roller 8.1 is articulated downwards in the same direction as arrow 17 and this
  • Gas exchange valve 1 is opened against the force of the valve spring 2.
  • the control contour 12 of the guide element 11 now has a first contour region I, which is shaped as a circular path, the center of which coincides with the axis of rotation of the guide element 11 and the pivot axis of the pivot element 8 when the gas exchange valve is closed. This has the effect that when the cam 14 rotates the pivoting element can pivot back and forth, but no force effect on the
  • the axis of rotation of the guide element 11 and the pivot axis 9 of the pivot element 8 must ideally coincide when the gas exchange valve is closed. Since the axis of rotation of the guide element 11 is stationary on the cylinder head, but the position of the pivot axis 9 of the pivot element 8 can deviate from the ideal position due to a chaining of manufacturing tolerances, as shown in FIG. 2, the play compensation element 6 is provided with means for adjusting the Swivel bearing 6.1 and thus provided for adjusting the swivel axis 9 of the swivel element 8 with respect to the axis of rotation of the guide element 11.
  • a bore 18 is provided in the cylinder head Z, into which a cylindrical sleeve with an eccentric bore 19, a so-called eccentric sleeve 20, is inserted.
  • the play compensation element 6 is inserted into the eccentric bore 19 of the eccentric sleeve 20.
  • the arrangement is gem.
  • Fig. 2 shown in a top view and the eccentricity e of the axis 6.2 of the play compensation element 6 to the axis 20.1 of the eccentric sleeve 20 can be seen.
  • the rocker arm 5 rests with a dome-shaped recess 5.1 on the correspondingly spherically shaped end of the play compensation element 6 which forms the pivot bearing 6.1.
  • FIG. 2 is shown in the same drawing plane as FIG. 1.
  • the play compensation element 6 and thus also the eccentric sleeve 20 are aligned in this embodiment in the pivot bearing 6.1 with its axis 6.2 inclined at an angle to the axis of movement 1.1 of the gas exchange valve 1 for reasons of favorable force introduction in this embodiment.
  • the eccentric sleeve 20 in the direction of arrow 21 from the in
  • FIG. 4 shows a perspective view of the eccentric sleeve 20 with the play compensation element 6 inserted.
  • the eccentric sleeve 20 has a radial bore 21, to which an oil distribution groove 22 is assigned on the outer surface.
  • a pressure oil channel 23 is cut through the receiving bore 18 in the cylinder head, so that with appropriate positioning of the bore 21 and the oil distribution groove 22 there is a connection to the play compensation elements 6 and thus through the movable part of the play compensation element a corresponding pressurization via the rocker arm 5, the stroke transmission means 4 can be kept free of play.
  • the play compensation element 6 and the eccentric sleeve 20 are used here in each case pressure-tight and liquid-tight.
  • eccentric sleeves which are kept for example in classes with eccentricities of 0.02 mm, 0.04 mm and 0.06 mm.
  • an appropriately selected eccentric sleeve is then used. This can be done, for example, in the form shown in FIG. 3, namely that the eccentricities in the gradation are used in a plane defined by the axis 6.2 of the play compensation element 6 and the movement axis 1.1 of the gas exchange valve 1.
  • Intermediate stages can then be set, for example, by inserting these classified eccentric sleeves at an angle to the plane mentioned above.
  • Both the rotatable version and the fixed version are then fixed in each case in the receiving bore 18, be it by frictional engagement, clamping action, a corresponding tab or by a pressed-in locking ball 24. as shown in Fig. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

La présente invention concerne un entraînement de soupape réglable de manière variable destiné à au moins une soupape d'échanges gazeux (1) présentant un ressort de fermeture (2) et appartenant un moteur à piston alternatif, notamment un moteur à combustion interne à piston alternatif, ledit entraînement comprenant: un élément d'entraînement (14) qui agit sur un élément de transmission de mouvement alternatif (4) qui agit sur la soupape d'échanges gazeux (1) contre la force du ressort de fermeture (2) et est composé de plusieurs parties élémentaires qui interagissent, ledit élément d'entraînement présentant un élément de commande (12) réglable et étant en liaison active avec un levier de traction (5) qui prend appui à son extrémité libre sur l'extrémité (3) de la tige de la soupape d'échanges gazeux (1) et dont l'autre extrémité se trouve sur un élément d'équilibrage de jeu (6) monté contre la culasse et formant un palier d'articulation (6.1), et qui est relié à un élément (20) qui sert à l'ajustage du palier d'articulation (9) par rapport à l'élément de transmission de mouvement alternatif (4).
PCT/EP2004/000124 2003-01-28 2004-01-10 Entrainement mecanique de soupape entierement variable destine a moteur a combustion interne a piston alternatif a equilibre de jeu de soupapes reglable WO2004067924A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE502004008865T DE502004008865D1 (de) 2003-01-28 2004-01-10 Vollvariabler mechanischer ventiltrieb f r eine kolbenbrennk raftmaschine mit justierbarem ventilspielausgleich
EP04701291A EP1590554B1 (fr) 2003-01-28 2004-01-10 Entrainement mecanique de soupape entierement variable destine a moteur a combustion interne a piston alternatif a equilibre de jeu de soupapes reglable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10303128A DE10303128A1 (de) 2003-01-28 2003-01-28 Vollvariabler mechanischer Ventiltrieb für eine Kolbenbrennkraftmaschine mit justierbarem Ventilspielausgleich
DE10303128.6 2003-01-28

Publications (1)

Publication Number Publication Date
WO2004067924A1 true WO2004067924A1 (fr) 2004-08-12

Family

ID=32602956

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/000124 WO2004067924A1 (fr) 2003-01-28 2004-01-10 Entrainement mecanique de soupape entierement variable destine a moteur a combustion interne a piston alternatif a equilibre de jeu de soupapes reglable

Country Status (5)

Country Link
EP (1) EP1590554B1 (fr)
CN (1) CN100460633C (fr)
AT (1) ATE421028T1 (fr)
DE (2) DE10303128A1 (fr)
WO (1) WO2004067924A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20050326A1 (it) 2005-05-12 2006-11-13 Luigi Conti Motore a combustione interna con valvole ad alzata variabile
WO2017160859A1 (fr) * 2016-03-18 2017-09-21 Cummins Inc. Rattrapeur de jeu hydraulique
EP3296531A1 (fr) * 2016-09-14 2018-03-21 Mechadyne International Limited Système de soupape de moteur
WO2018063979A1 (fr) * 2016-09-28 2018-04-05 Cecil Adam C Rattrapeur de jeu hydraulique excentrique destiné à être utilisé avec un frein à relâchement de compression

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179990A2 (fr) * 1984-09-28 1986-05-07 Allied Corporation Procédé pour commander la distribution variable de soupape pour un moteur à combustion interne
JPS63297713A (ja) * 1987-05-29 1988-12-05 Suzuki Motor Co Ltd 四サイクルエンジンのバルブリフト可変装置
DE4105194A1 (de) * 1991-02-20 1992-08-27 Bayerische Motoren Werke Ag Betaetigungsvorrichtung fuer ein hubventil
DE4320146A1 (de) * 1992-06-30 1994-01-05 Volkswagen Ag Maschine mit über Schwinghebel betätigten Hubventilen
WO2001075279A1 (fr) * 2000-03-31 2001-10-11 Audi Ag Commande de soupape variable avec element coulissant et course a vide
DE10100173A1 (de) * 2001-01-04 2002-07-11 Fev Motorentech Gmbh Vollvariabler mechanischer Ventiltrieb für eine Kolbenbrennkraftmaschine
EP1350928A2 (fr) * 2002-04-06 2003-10-08 Willi Roth Appareil pour actionnement variable d'une soupape d'un moteur à combustion interne

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10125082A1 (de) * 2001-05-23 2002-11-28 Bayerische Motoren Werke Ag Ventiltrieb-Vorrichtung für eine Brennkraftmaschine
CN2502011Y (zh) * 2001-08-23 2002-07-24 宜宾天工机械股份有限公司 一种摇臂插入式配气机构的传动组件

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179990A2 (fr) * 1984-09-28 1986-05-07 Allied Corporation Procédé pour commander la distribution variable de soupape pour un moteur à combustion interne
JPS63297713A (ja) * 1987-05-29 1988-12-05 Suzuki Motor Co Ltd 四サイクルエンジンのバルブリフト可変装置
DE4105194A1 (de) * 1991-02-20 1992-08-27 Bayerische Motoren Werke Ag Betaetigungsvorrichtung fuer ein hubventil
DE4320146A1 (de) * 1992-06-30 1994-01-05 Volkswagen Ag Maschine mit über Schwinghebel betätigten Hubventilen
WO2001075279A1 (fr) * 2000-03-31 2001-10-11 Audi Ag Commande de soupape variable avec element coulissant et course a vide
DE10100173A1 (de) * 2001-01-04 2002-07-11 Fev Motorentech Gmbh Vollvariabler mechanischer Ventiltrieb für eine Kolbenbrennkraftmaschine
EP1350928A2 (fr) * 2002-04-06 2003-10-08 Willi Roth Appareil pour actionnement variable d'une soupape d'un moteur à combustion interne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 0131, no. 30 (M - 808) 30 March 1989 (1989-03-30) *

Also Published As

Publication number Publication date
EP1590554B1 (fr) 2009-01-14
ATE421028T1 (de) 2009-01-15
DE502004008865D1 (de) 2009-03-05
CN1742152A (zh) 2006-03-01
CN100460633C (zh) 2009-02-11
EP1590554A1 (fr) 2005-11-02
DE10303128A1 (de) 2004-07-29

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